Tweco CutMaster 12mm-20mm-25mm - Manual (Page 30)

CUTMASTER 12mm, 20mm, 25mm
OPERATION 4-2 Manual 0-5117
4.02 Preparations for Operation
At the start of each operating session:
WARNING
Disconnect primary power at the source before
assembling or disassembling power supply,
torch parts, or torch and leads assemblies.
Torch Parts Selection
Check the torch for proper assembly and appropri-
ate torch parts. The torch parts must correspond
with the type of operation, and with the amperage
output of this Power Supply (40 amps maximum
for the 12mm, 60 amps maximum for the 20mm,
and 80 amps maximum for the 25mm). Refer to
Section 4T.07 and following for torch parts selec-
tion.
Torch Connection
Check that the torch is properly connected. Only
Thermal Dynamics model SL60 / Manual or SL100
/ Mechanical Torches may be connected to this
Power Supply. See Section 3T of this manual.
Check Primary Input Power Source
1. Check the power source for proper input
voltage. Make sure the input power
source meets the power requirements for
the unit per Section 2, Specifications.
2. Connect the input power cable (or close
the main disconnect switch) to supply
power to the system.
Air Source
Ensure source meets requirements (refer to Section
2). Check connections and turn air supply ON.
Connect Work Cable
Clamp the work cable to the workpiece or cutting
table. The area must be free from oil, paint and
rust. Connect only to the main part of the work-
piece; do not connect to the part to be cut off.
Art # A-04509
Power ON
Place the Power Supply ON / OFF switch to the
ON (up) position. AC indicator turns ON.
Gas indicator turns ON if there is sufficient
gas pressure for power supply operation and the
cooling fans turn ON.
NOTE
Minimum pressure for power supply operation
is lower than minimum for torch operation.
The cooling fans will turn ON as soon as the
unit is turned ON. After the unit is idle for
ten (10) minutes the fans will turn OFF. The
fans will come back ON as soon as the torch
switch (Start Signal) is activated or if the unit
is turned OFF, then turned ON again. If an over
temperature condition occurs, the fans will
continue to run while the condition exists and
for a ten (10) minute period once the condition
is cleared.
Set Operating Pressure
1. Place the Power Supply Function Control
knob to the SET position. Gas will
flow.
2. For Standoff cutting, adjust gas pressure
from 70 - 85 psi / 4.8 - 5.9 bar (LED's
in center of control panel). Refer to the
Standoff chart for pressure setting details.
A
+
PSI BAR
MAX MAX
MIN MIN
!
1 2
Art# A-07946
MIN MAX